Optics Without MathematicsSociety for promoting Christian knowledge, 1883 - 124 páginas |
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Página 19
... curious and interesting exhibition in the Looking - glass , which would seem to us a very surprising one , were we not so familiar with it . It is only a plane mirror , though too often a very imperfect one , from defects in material or ...
... curious and interesting exhibition in the Looking - glass , which would seem to us a very surprising one , were we not so familiar with it . It is only a plane mirror , though too often a very imperfect one , from defects in material or ...
Página 21
... curious effects follow . We see ourselves writing with the left hand , and in the same direction with Hebrew or Arabic . The printing of an open book will all run the wrong way . We hold the knife in the left hand , the fork in the ...
... curious effects follow . We see ourselves writing with the left hand , and in the same direction with Hebrew or Arabic . The printing of an open book will all run the wrong way . We hold the knife in the left hand , the fork in the ...
Página 22
... curious varieties of effect , differing accord- ing to the angle . If two long narrow mirrors are placed face to face , and their lower edges kept close while their tops are gradually sepa- rated , a position will be found where an eye ...
... curious varieties of effect , differing accord- ing to the angle . If two long narrow mirrors are placed face to face , and their lower edges kept close while their tops are gradually sepa- rated , a position will be found where an eye ...
Página 29
... curious phænomenon . But there are other things to be noticed about it . Light being reversible and the foci conjugate , the object and the image might change places ; at least if the object , unlike a taper , would bear inversion ; and ...
... curious phænomenon . But there are other things to be noticed about it . Light being reversible and the foci conjugate , the object and the image might change places ; at least if the object , unlike a taper , would bear inversion ; and ...
Página 32
... curious illusions may be produced by large concave mirrors ; the object and mirror being concealed , and the image received on smoke , or on some suitable screen , or the eye being placed in the reflected rays . 1 As the sun's rays are ...
... curious illusions may be produced by large concave mirrors ; the object and mirror being concealed , and the image received on smoke , or on some suitable screen , or the eye being placed in the reflected rays . 1 As the sun's rays are ...
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Términos y frases comunes
angles of incidence aperture axis beautiful called candle circle cloth boards colour concave lens concave mirror conjugate foci converging convex lens course crossing crystal crystalline lens curious curves dark direction dispersion distance Double Refraction edge equal angles equi-convex eye-lens Fcap feet focal image focal length form an image fraction front happens hole inches larger lenses look looking-glass magnifying power microscope minute moon Newtonian reflector NORTHUMBERLAND AVENUE object object-glass opposite optical parallel rays perfect perfectly picture plane mirror polarised position prism produce PROMOTING CHRISTIAN KNOWLEDGE properties of light proportion radiant radius rainbow ray passes reflected rays reflecting telescopes refraction retina reverse right angles seen shorter focus side sideways sine Sir EDMUND BECKETT spectrum speculum sphere spherical spherical aberration straight line suppose surface telescope thing tion turned undulations violet waves wonderful
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